Composition of matter containing oxids of aluminum and titanium.



UNITED OFFICE.

LEWIS E. SAUNDERS, 0F NIAGARA FALLS, N YORK, ASSIGNOR TO NORTON COMPANY,OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

COMPOSITION OF MATTER CONTAINING OXIDS OF ALUMINUM AND TITANIUM.-

No Drawing.

Specification of Letters Patent. Application flledJanuary 14, 1909.

Patented A r-.12, 1910. Serial No. 472,347. (Specimens) To all whom itmay concern:

Be it known that I, LEWIS E. SAUNDERS, a citizen of the United States,residing at Niagara Falls, in the county of Niagara and State of NewYork, have invented certain This composition of matter is avai able foruse as an abrasive, as a refractory material for the production of castor-molded articles, and for other purposes. A product having thedesiredpercentage of, titanium oxid, T10 is readily prepared byathoroughlymixing oxid :of aluminum with rutile or other form of titanium oxid, andfusing the mass in an electric furnace into a homogeneous product. Thisfusion is advantageously efiected in a furnace of the type shown in U.S. Patent Noni/15,654, granted November 22, 1904: to Aldus C. Higgins.For example I haVeLfi-fepared a product containing substantially 395.5per cent. of alumina and 4.5 per cent. of titanium oxid by fusingamixture containing the substantially pure oxids of aluminum and titaniumin approximately these proportions. The

product is an exceedingly hard mass having a brown or red-brown colorand a vltreous luster. The melting point of this material is rather lowas compared with pure" alumina, and the material is when molten a oodconductor of electricity. A product aving 94 per. cent. of alumnia andsix per cent. of titanium oxid resembles the above in its generalcharacteristics, but is darker in color, and tougher and more massive,being of aless granular or crystalline structure.

This product appears to be somewhat more fusible than the preceding, isvery hard, and possesses abrasive qualities of a very hi h order. Higherproportions of titanium oxid than those mentioned may be employed toadvantage for certain purposes. This product may of course be preparedby other methods than that herein described, as for example by thefusion of bauxite or other I aluminous -1naterial containing titaniumoxid, such material having been previously treated for the eliminationof other constituents such as iron oxid and silica; It is found thateven relatively small proportions of such fiuxing impurities as theoxids of iron and silicon, and especially the latter, exercise aprofound influence on the characteristics of the product, and thepresent invention does not contemplate the presence in the mass ofsubstantial proportions of these oxids, by. which is meant a proportionof either oxidin' excess of about one per cent. by weight of the mass. 7

I claim:

The herein described homogeneous,' previously molten material,consisting essns tia'lly of the o-xids of aluminum and titerized by itshardness and toughness and by its massive structure.

In testimony whereof, I affix my signature in presence of two witnesses.

I LEWIS l SAUNDERS. Witnesses: j

-" S. F. HALL,

NEIL A. WILSON.

